package fr.ants.utils;

import java.io.File;

/**
 * String formatter.
 * 
 * @author Guillaume
 * 
 */
public class Formatter {
	/**
	 * Gets the extension of a file.
	 * 
	 * @param f
	 *            the file that user would open
	 * @return the file extension
	 */
	public static String getExtension(File f) {
		String ext = null;
		String s = f.getName();
		int i = s.lastIndexOf('.');

		if (i > 0 && i < s.length() - 1) {
			ext = s.substring(i + 1).toLowerCase();
		}
		return ext;
	}
}
